clickhouse
https://github.com/yandex/clickhouse
C++
ClickHouse is a free analytic DBMS for big data.
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- Issues
- Fix false "different secondary indices"/ordering on REPLACE PARTITIO FROM
- Fix CTE column aliases for INTERSECT/EXCEPT queries
- Fix LOGICAL_ERROR in OPTIMIZE ... DRY RUN racing a concurrent merge
- Fix RENAME TABLE of a Distributed table with a non-empty async-insert queue
- std::length_error in ReadFromMergeTree::groupPartitionsByStreams: unbounded pipes.reserve(num_streams) for pathological max_streams_for_merge_tree_reading
- Promote exponentialTimeDecayed window-functions to aggregate-functions
- Support real hard links for plain_rewritable metadata.
- Fix null pointer dereference in getSubcolumn on JSON with type-hint name
- Reuse cached `JSON` subcolumn serializations
- Surface projection filtering in EXPLAIN indexes and `force_optimize_projection`
- Docs
- C++ not yet supported